我正在编写一个Android应用程序,如果手机连接或断开连接到WIFI网络,它应该做出反应。我为此注册了BroadcastReceiver
,效果很好。现在使用此代码,如果手机连接到WIFI,我可以获取当前的WIFI ID:
WifiManager mainWifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo currentWifi = mainWifi.getConnectionInfo();
int id = currentWifi.getNetworkId();
但是,如果WIFI断开连接并且我想获得最后连接的WIFI的WIFI ID怎么办?我的问题是这一切都在BroadcastReceiver
。如果新的广播进来,这总是新建的,所以我无法在那里真正保存一些数据。是否有方法或其他方法可以获取最后连接的WIFI ID?
答案 0 :(得分:1)
如果我错过了什么,请原谅我。您可以getSharedPreferences从广播接收器访问上下文。
此BroadcastReceiver拦截android.net.ConnectivityManager.CONNECTIVITY_ACTION,表示连接更改。它检查类型是否为TYPE_WIFI。如果是,则检查Wi-Fi是否已连接,并相应地在主活动中设置wifiConnected标志。
public class NetworkReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager connMgr =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
// Checks the user prefs and the network connection. Based on the result, decides
// whether
// to refresh the display or keep the current display.
// If the userpref is Wi-Fi only, checks to see if the device has a Wi-Fi connection.
if (WIFI.equals(sPref) && networkInfo != null
&& networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
// If device has its Wi-Fi connection, sets refreshDisplay
// to true. This causes the display to be refreshed when the user
// returns to the app.
您可以在此处找到sample app。